Concerned with the continuing, and growing, anti-Semitism of his day, Jacobs laid presented a statement of the Jewish contribution to civilization. Beginning with the convention of Jewish self-recognition as the people of the book, he sketches the relationship between the church and the Jews. He notes that Jews in the Middle Ages were intellectual intermediaries and their works had a profound impact on Medieval thought. Their roles in commerce and capitalism are explored. Noting the contribution throughout history of Jews to the cause of liberality, Jacob makes a profound case for seeing the deep impact Judaism has made on the modern world.